<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>



    <script>

        function f(str1,  str2) {

            alert(str1 + str2)
        }


        f( "zs", "ls" )

    </script>

</body>
</html>
